Channel switching apparatus

ABSTRACT

This channel switching apparatus comprises a first channel switching device ( 303 ) for switching a first main channel and a second main channel, a second channel switching device ( 305 ) for switching a third main channel and a fourth main channel, a third channel switching device ( 307 ) for switching a fifth main channel and a sixth main channel, and a fourth channel switching device ( 308 ) for switching a seventh main channel and an eighth main channel. Thus, a channel switching apparatus which can readily and correctly perform even by touch can be provided.

TECHNICAL FIELD

The present invention relates to a channel switching apparatus, and more specifically, it relates to an improvement of the structure of a channel switching apparatus attaining simplification of manipulation.

BACKGROUND ART

FIG. 19 shows the structure of a manifold 200 employed for an angiographic apparatus employing a contrast medium as an example of a conventional channel switching apparatus.

Referring to the figure, a body part 200A is provided with a first channel 201 a, a second channel 201 b, a third channel 202, a fourth channel 201 c, a fifth channel 204, a sixth channel 201 d and a seventh channel 206.

A first cock 203 for switching a first main channel formed by coupling the first channel 201 a and the second channel 201 b with each other and a second main channel formed by coupling the first channel 201 a and the third channel 202 with each other is provided for the first channel 201 a, the second channel 201 b and the third channel 202.

In the state shown in FIG. 19, the first main channel is formed by the first cock 203 (hereinafter this state is referred to as state A1). The second main channel is formed by rotating a handle 203 a of the first cock 203 by 90° anticlockwise (hereinafter this state is referred to as state B1).

A second cock 205 for switching a third main channel formed by coupling the second channel 201 b and the fourth channel 201 c with each other and a fourth main channel formed by coupling the second channel 201 b and the fifth channel 204 with each other is provided for the second channel 20lb, the fourth channel 201 c and the fifth channel 204. In a state shown in FIG. 20, the third main channel is formed by the second cock 205 (hereinafter this state is referred to as state A2). The fourth main channel is formed by rotating a handle 205 a of the second cock 205 by 90° anticlockwise (hereinafter this state is referred to as state B2).

A third cock 207 for switching a fifth main channel formed by coupling the fourth channel 201 c and the sixth channel 201 d with each other and a sixth main channel formed by coupling the fourth channel 201 c and the seventh channel 206 with each other is provided for the fourth channel 201 c, the sixth channel 201 d and the seventh channel 206.

In the state shown in FIG. 20, the fifth main channel is formed by the third cock 207 (hereinafter this state is referred to as state A3). The sixth main channel is formed by rotating a handle 207 a of the third cock 207 by 90° anticlockwise (hereinafter this state is referred to as state B3).

A syringe 100 is connected to one end of the first channel 201 a, a contrast medium 250 is connected to the third channel 202 in a flowable manner, a physiological salt solution is connected to the fifth channel 204 in a flowable manner, a sphygmomanometric apparatus 270 is connected to the seventh channel 206, and a catheter 210 having an end introduced into a blood vessel 310 of a case 320 is connected to the sixth channel 201 d with interposition of a rotator 220. The rotator 220 is employed for rotating the catheter 210 itself, and the direction of the catheter 210 is so adjusted, that introduction of the contrast medium 250 and the like into the blood vessel 310 is properly performed. A [sphygmomanometric operation], a [contrast medium aspirating operation], a [contrast medium introducing operation], a [physiological salt solution aspirating operation] and a [physiological salt solution introducing operation] are now described with reference to FIG. 20 to FIG. 24.

[Sphygmomanometric Operation]

The sphygmomanometric operation employing the manifold 200 is described with reference to FIG. 20. In the sphygmomanometric operation, the third cock 207 is set in the state B3 for forming the sixth main channel. Thus, blood from the case 320 is introduced into the sphygmomanometric apparatus 270, and the blood pressure of the case 320 is measurable.

[Contrast Medium Aspirating Operation]

The contrast medium aspirating operation employing the manifold 200 is described with reference to FIG. 21. In the contrast medium aspirating operation, the first cock 203 is set in the state B1 for forming the second main channel. Thus, aspiration of the contrast medium 250 employing the syringe 100 is enabled. At this time, the sphygmomanometric operation of the case 320 is continued by maintaining the third cock 207 in the state B3.

[Contrast Medium Introducing Operation]

The contrast medium introducing operation employing the manifold 200 is described with reference to FIG. 22. In the contrast medium introducing operation, the first cock 203 is set in the state A1, the second cock 205 is set in the state A2 and the third cock 207 is set in the state A3, for allowing the first main channel, the third main channel and the fifth main channel to communicate with each other. Thus, it is enabled to introduce the contrast medium 250 stored in the syringe 100 into the blood vessel 310 of the case 320.

[Physiological Salt Solution Aspirating Operation]

The physiological salt solution aspirating operation employing the manifold 200 is described with reference to FIG. 23. In the physiological salt solution aspirating operation, the first cock 203 is set in the state A1 for forming the first main channel while the second cock 205 is set in the state B2 for forming the fourth main channel. Thus, aspiration of a physiological salt solution 260 with the syringe 100 is enabled. At this time, the sphygmomanometric operation of the case 320 is enabled by setting the third cock 207 in the state B3.

[Physiological Salt Solution Introducing Operation]

The physiological salt solution introducing operation employing the manifold 200 is described with reference to FIG. 24. In the physiological salt solution introducing operation, the first cock 203 is set in the state A1, the second cock 205 is set in the state A2 and the third cock 207 is set in the state A3 for allowing the first main channel, the third main channel and the fifth main channel communicate with each other. Thus, it is enabled to introduce the physiological salt solution 260 stored in the syringe 100 into the blood vessel 310 of the case 320. This physiological salt solution 260, which is introduced in order to form no thrombus, is called flush.

A doctor (hereinafter referred to as operator) performing angiography with the manifold 200 having the aforementioned structure must perform each of the aforementioned operations by touch while observing a monitor image of the affected part reflected by X rays. Therefore, the operator must frequently perform switching of each cock with his left hand while holding the syringe 100 with the right hand. Particularly at the time from the [contrast medium aspirating operation] to the [contrast medium introducing operation] and at the time from the [physiological salt solution aspirating operation] to the [physiological salt solution introducing operation], it is necessary to switch two cocks.

Further, the cocks must necessarily be switched also in each operation, the switching involves troublesomeness while correctness of the switching is required, and there arises such a problem that concentration of the essential important operation for carefully observing the state of the affected part while observing the monitor image cannot be sustained.

Accordingly, an object of the present invention, which has been proposed in order to solve the aforementioned problem, is to provide a channel switching apparatus with which one can readily and correctly perform manipulation of a channel switching apparatus such as a manifold even by touch.

DISCLOSURE OF THE INVENTION

In one aspect of the channel switching apparatus based on the present invention, a channel switching apparatus having a body frame including a first channel, a second channel and a third channel for switching a first main channel formed by coupling the aforementioned first channel and the aforementioned second channel with each other and a second main channel formed by coupling the aforementioned first channel and the aforementioned third channel with each other comprises a switching device provided on an intersection point between the aforementioned first channel, the aforementioned second channel and the aforementioned third channel and having a first coupling channel for coupling the aforementioned first channel and the aforementioned second channel with each other on a first position and a second coupling channel for coupling the aforementioned first channel and the aforementioned third channel with each other on a second position by sliding in a direction substantially perpendicular to a plane including the aforementioned first main channel and the aforementioned second main channel and an urging device for urging the aforementioned switching device so that the aforementioned switching device is urged to be located on the aforementioned first position in a general state and the aforementioned switching device is located on the aforementioned second position only when moved against urging force.

By employing the aforementioned structure, the first main channel is formed in the general state and the second main channel is formed only when moving the aforementioned switching device to the second position against the urging force. When canceling the urging force, therefore, the first main channel of the general state is enabled to return.

Consequently, the first main channel is formed when doing nothing and the switching device may be moved to the second position against the urging force only when needed in order to manipulate this channel switching apparatus, whereby it is enabled to readily and correctly perform manipulation thereof.

In order to execute the aforementioned channel switching apparatus in a more preferable state, the following structure is employed: The aforementioned switching device is a columnar member extending in the direction substantially perpendicular to the plane including the aforementioned first main channel and the aforementioned second main channel, the aforementioned first coupling channel and second coupling channel are provided on its body part with a space in the aforementioned perpendicular direction, a concave part for storing the aforementioned urging device is provided on one end of the aforementioned columnar member, and a recognition area for allowing a person manipulating the channel switching apparatus to tactually recognize the position of the aforementioned switching device is provided on the other end. Preferably, the aforementioned urging device is an elastic member provided between the concave part provided on the aforementioned columnar member and the aforementioned body frame.

By this structure, the manipulating person is enabled to readily and correctly perform the manipulation of the channel switching apparatus even by touch.

In another aspect of the channel switching apparatus based on the present invention, a channel switching apparatus having a first channel, a second channel and a third channel for switching a first main channel formed by coupling the aforementioned first channel and the aforementioned second channel with each other and a second main channel formed by coupling the aforementioned first channel and the aforementioned third channel comprises a switching device provided on an intersection point between the aforementioned first channel, the aforementioned second channel and the aforementioned third channel for sliding between a first position and a second position in a plane including the aforementioned first main channel and the aforementioned second main channel thereby coupling the aforementioned first channel and the aforementioned second channel with each other on the first position and coupling the aforementioned first channel and the aforementioned third channel with each other on the aforementioned second position, and an urging device for urging the aforementioned switching device so that the aforementioned switching device is urged to be located on the aforementioned first position in a general state and the aforementioned switching device is located on the aforementioned second position against urging force only when the flow rate in the aforementioned third channel exceeds a prescribed value.

By employing the aforementioned structure, the first main channel is formed in the general state while the aforementioned switching device is located on the aforementioned second position against the urging force and the second main channel is formed only when the flow rate in the aforementioned third channel exceeds the prescribed value. When the flow rate in the aforementioned third channel lowers below the prescribed value, the first main channel is enabled to return.

Consequently, a person manipulating this channel switching apparatus is enabled to switch the first main channel and the second main channel only by adjustment of the flow rate in the third channel, and enabled to readily and correctly perform manipulation of the channel switching apparatus.

In order to execute the aforementioned channel switching apparatus in a more preferable state, the following structure is employed: The aforementioned switching device is a valve element, and the urging device is an elastic member arranged to shut off the aforementioned third channel with the aforementioned valve element in the general state.

In still another aspect of the channel switching apparatus based on the present invention, it comprises a body frame including a first channel, a second channel, a third channel, a fourth channel, a fifth channel, a sixth channel, a seventh channel, and an eighth channel and a ninth channel diverging from the aforementioned fourth channel, a first channel switching device for switching a first main channel formed by coupling the aforementioned first channel and the aforementioned second channel with each other and a second main channel formed by coupling the aforementioned first channel and the aforementioned third channel with each other, a second channel switching device for switching a third main channel formed by coupling the aforementioned second channel and the aforementioned fourth channel with each other and a fourth main channel formed by coupling the aforementioned second channel and the aforementioned fifth channel with each other, a third channel switching device for switching a fifth main channel formed by coupling the aforementioned fourth channel and the aforementioned sixth channel with each other and a sixth main channel formed by coupling the aforementioned sixth channel and the aforementioned ninth channel with each other, and a fourth channel switching device for switching a seventh main channel formed by coupling the aforementioned seventh channel and the aforementioned ninth channel with each other and an eighth main channel formed by coupling the aforementioned eighth channel and the aforementioned ninth channel with each other.

Further, the aforementioned first channel switching device has a first switching device provided on an intersection point between the aforementioned first channel, the aforementioned second channel and the aforementioned third channel and having a first coupling channel for coupling the aforementioned first channel and the aforementioned second channel with each other on a first position and a second coupling channel for coupling the aforementioned first channel and the aforementioned third channel with each other on a second position by sliding in a direction substantially perpendicular to a plane including the aforementioned first main channel and the aforementioned second main channel and a first urging device for urging the aforementioned first switching device so that the aforementioned first switching device is urged to be located on the aforementioned first position in a general state and the aforementioned first switching device is located on the aforementioned second position only when moved against urging force, the aforementioned second channel switching device has a second switching device provided on an intersection point between the aforementioned second channel, the aforementioned fourth channel and the aforementioned fifth channel and having a third coupling channel for coupling the aforementioned second channel and the aforementioned fourth channel with each other on a first position and a fourth coupling channel for coupling the aforementioned second channel and the aforementioned fifth channel with each other on a second position by sliding in a direction substantially perpendicular to a plane including the aforementioned third main channel and the aforementioned fourth main channel and a second urging device for urging the aforementioned second switching device so that the aforementioned second switching device is urged to be located on the aforementioned first position in a general state and the aforementioned second switching device is located on the aforementioned second position only when moved against urging force, the aforementioned third channel switching device has a third switching device provided on an intersection point between the aforementioned fourth channel, the aforementioned sixth channel and the aforementioned ninth channel and having a fifth coupling channel for coupling the aforementioned sixth channel and the aforementioned ninth channel with each other on a first position and a sixth coupling channel for coupling the aforementioned sixth channel and the aforementioned fourth channel with each other on a second position by sliding in a direction substantially perpendicular to a plane including the aforementioned fifth main channel and the aforementioned sixth main channel and a third urging device for urging the aforementioned third switching device so that the aforementioned third switching device is urged to be located on the aforementioned first position in a general state and the aforementioned third switching device is located on the aforementioned second position only when moved against urging force, and the aforementioned fourth channel switching device has a fourth switching device provided on an intersection point between the aforementioned seventh channel, the aforementioned eighth channel and the aforementioned ninth channel for moving between a first position and a second position in a plane including the aforementioned seventh main channel and the aforementioned eighth main channel thereby coupling the aforementioned seventh channel and the aforementioned ninth channel with each other on the aforementioned first position and coupling the aforementioned ninth channel and the aforementioned eighth channel with each other on the aforementioned second position and a fourth urging device for urging the aforementioned fourth switching device so that the aforementioned fourth switching device is urged to be located on the aforementioned first position in a general state and the aforementioned fourth switching device is located on the aforementioned second position against urging force only when the flow rate in the aforementioned eighth channel exceeds a prescribed value.

By employing the aforementioned structure, the first channel, the third channel and the fourth channel communicate with each other in the general state, and it is further enabled to implement such a state that the sixth channel, the ninth channel and the seventh channel communicate with each other.

Further, the first channel and the second channel are shut off and the second main channel is formed only when moving the first switching device to the second position against the urging force. When canceling the urging force, therefore, the general state of such a state that the first main channel and the third main channel communicate with each other is enabled to return.

The second channel and the fourth channel are shut off and the fourth main channel is formed only when moving the second switching device to the second position against the urging force. When canceling the urging force, therefore, the general state of such a state that the first main channel and the third main channel communicate with each other is enabled to return.

The sixth channel and the ninth channel are shut off and the fifth main channel is formed only when moving the third switching device to the second position against the urging force. When canceling the urging force, therefore, the general state of such a state that the sixth channel and the ninth channel communicate with each other is enabled to return.

The aforementioned fourth switching device is located on the aforementioned second position against the urging force and the eighth main channel is formed only when the flow rate in the eighth channel exceeds the prescribed value. When the flow rate in the aforementioned eighth channel lowers below the prescribed value, the seventh main channel is enabled to return.

Consequently, the first main channel is formed when doing nothing and the switching device may be moved to the second position against the urging force only when needed, in order to manipulate this passage switching apparatus. Further, switching between the seventh main channel and the eighth main channel is enabled only by adjustment of the flow rate in the eighth channel. Consequently, it is enabled to readily and correctly perform manipulation thereof.

In order to execute the aforementioned channel switching apparatus in a more preferable state, the following structure is employed: The aforementioned first switching device is a first columnar member extending in the direction substantially perpendicular to the plane including the aforementioned first main channel and the aforementioned second main channel, the aforementioned first coupling channel and the aforementioned second coupling channel are provided on its body part with a space in the aforementioned perpendicular direction, a first concave part for storing the aforementioned urging device is provided on an end of the aforementioned columnar member while a first recognition area for allowing a person manipulating the channel switching apparatus to tactually recognize the position of the aforementioned first switching device is provided on the other end, the aforementioned second switching device is a second columnar member extending in the direction substantially perpendicular to the plane including the aforementioned third main channel and the aforementioned fourth main channel, the aforementioned third coupling channel and the aforementioned fourth coupling channel are provided on its body part with a space in the aforementioned perpendicular direction, a second concave part for storing the aforementioned urging device is provided on an end of the aforementioned second columnar member while a second recognition area for allowing the person manipulating the channel switching apparatus to tactually recognize the position of the aforementioned second switching device is provided on the other end, the aforementioned third switching device is a third columnar member extending in the direction substantially perpendicular to the plane including the aforementioned fifth main channel and the aforementioned sixth main channel, the aforementioned fifth coupling channel and the aforementioned sixth coupling channel are provided on its body part with a space in the aforementioned perpendicular direction, a third concave part for storing the aforementioned urging device is provided on an end of the aforementioned third columnar member while a third recognition area for allowing the person manipulating the channel switching apparatus to tactually recognize the position of the aforementioned third switching device is provided on the other end, and different shapes are provided for the aforementioned first recognition area, second recognition area and third recognition area respectively.

By this structure, the manipulating person is enabled to readily and correctly perform manipulation of the first channel switching device, the second channel switching device and the third channel switching device even by touch.

Preferably, a syringe having a piston is connected to the aforementioned first channel, a contrast medium is connected to the aforementioned third channel in a flowable manner, a physiological salt solution is connected to the aforementioned fifth channel in a flowable manner, another end of a catheter having an end introduced into a blood vessel of a human body is connected to the aforementioned sixth channel, and a sphygmomanometric apparatus is connected to the aforementioned seventh channel.

In a further aspect of the channel switching apparatus based on the present invention, a channel switching apparatus having a body frame including a first channel, a second channel and a third channel for switching a first main channel formed by coupling the aforementioned first channel and the aforementioned second channel with each other and a second main channel formed by coupling the aforementioned first channel and the aforementioned third channel with each other comprises a switching device provided on an intersection point between the aforementioned first channel, the aforementioned second channel and the aforementioned third channel and having a coupling channel for coupling the aforementioned first channel and the aforementioned second channel with each other on a first position and coupling the aforementioned first channel and the aforementioned third channel with each other on a second position by sliding in a direction substantially perpendicular to a plane including the aforementioned first main channel and the aforementioned second main channel and an urging device for urging the aforementioned switching device so that the aforementioned switching device is urged to be located on the aforementioned first position in a general state and the aforementioned switching device is located on the aforementioned second position only when moved against urging force.

By employing the aforementioned structure, the first main channel is formed in the general state and the second main channel is formed only when moving the aforementioned switching device to the second position against the urging force. When canceling the urging force, therefore, the first main channel of the general state is enabled to return.

Consequently, the first main channel is formed when doing nothing while the switching device may be moved to the second position against the urging force only when needed in order to manipulate this channel switching apparatus, whereby it is enabled to readily and correctly perform manipulation thereof.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a plan view showing the structure of a manifold 300 in an embodiment 1.

FIG. 2 is a sectional view taken along the line X-X′ in FIG. 1.

FIG. 3 is a perspective view showing the structure of a first switching button 303 a.

FIG. 4 is a perspective view showing the structure of a second switching button 305 a.

FIG. 5 is a perspective view showing the structure of a third switching button 307 a.

FIG. 6 is a plan view showing the structure of a fourth channel switching device 308.

FIG. 7 is a model diagram showing a [sphygmomanometric operation] employing the manifold 300 in the embodiment 1.

FIG. 8 is a model diagram showing a [contrast medium aspirating operation] employing the manifold 300 in the embodiment 1.

FIG. 9 is a model diagram showing a [contrast medium introducing operation] employing the manifold 300 in the embodiment 1.

FIG. 10 is a perspective view showing a schematic structure of a contrast medium introduction device 150.

FIG. 11 is a model diagram showing a [physiological salt solution aspirating operation] employing the manifold 300 in the embodiment 1.

FIG. 12 is a model diagram showing a [physiological salt solution introducing operation] employing the manifold 300 in the embodiment 1.

FIG. 13 is a model diagram showing a [blood aspirating operation] employing the manifold 300 in the embodiment 1.

FIG. 14 is a perspective view showing another structure of the first switching button 303 a.

FIG. 15 is a perspective view showing still another structure of the first switching button 303 a.

FIG. 16 is a perspective view showing another structure of the fourth channel switching device 308.

FIG. 17 is a perspective view showing still another structure of the fourth channel switching device 308.

FIG. 18 is a plan view showing the structure of a manifold 400 in an embodiment 2.

FIG. 19 is a plan view showing the structure of a manifold 200 in the prior art.

FIG. 20 is a model diagram showing a [sphygmomanometric operation] employing the manifold 200 in the prior art.

FIG. 21 is a model diagram showing a [contrast medium aspirating operation] employing the manifold 200 in the prior art.

FIG. 22 is a model diagram showing a [contrast medium introducing operation] employing the manifold 200 in the prior art.

FIG. 23 is a model diagram showing a [physiological salt solution aspirating operation] employing the manifold 200 in the prior art.

FIG. 24 is a model diagram showing a [physiological salt solution introducing operation] employing the manifold 200 in the prior art.

BEST MODES FOR CARRYING OUT THE INVENTION

Channel switching apparatuses in embodiments based on the present invention are now described with reference to the drawings. As an example of the channel switching apparatus, a case of applying the same to a manifold employed for an angiographic apparatus employing a contrast medium similarly to the prior art is described.

(Embodiment 1)

FIG. 1 and FIG. 2 show the structure of a manifold 300 in this embodiment. FIG. 1 shows a plan view of the manifold 300, and FIG. 2 is a sectional view taken along the line X-X′ in FIG. 1.

Referring to both figures, a body part 301 is provided with a first channel 301 a, a second channel 301 b, a third channel 302, a fourth channel 301 c, a fifth channel 304, a sixth channel 301 d, a seventh channel 306, and an eighth channel 301 f and a ninth channel 301 g diverging from the fourth channel 301 c.

A first main channel is formed by coupling the first channel 301 a and the second channel 301 b with each other. A second main channel is formed by coupling the first channel 301 a and the third channel 302 with each other. A first channel switching device 303 for switching the first main channel and the second main channel is provided on an intersection point between the first channel 301 a, the second channel 301 b and the third channel 302.

A third main channel is formed by coupling the second channel 301 b and the fourth channel 301 c with each other. A fourth main channel is formed by coupling the second channel 301 b and the fifth channel 304 with each other. A second channel switching device 305 provided on an intersection point between the second channel 301 b, the fourth channel 301 c and the fifth channel 304 for switching the third main channel and the fourth main channel is provided.

A fifth main channel is formed by coupling the fourth channel 301 c and the sixth channel 301 d with each other. A sixth main channel is formed by coupling the sixth channel 301 d and the ninth channel 301 g with each other. A third channel switching device 307 provided on an intersection point between the sixth channel 301 d and the ninth channel 301 g for switching the fifth main channel and the sixth main channel is provided.

A seventh main channel is formed by coupling the seventh channel 306 and the ninth channel 301 g with each other. An eighth main channel is formed by coupling the eighth channel 301 f and the ninth channel 301 g with each other. A fourth channel switching device 308 provided on an intersection point between the seventh channel 306, the eighth channel 301 f and the ninth channel 30lg for switching the seventh main channel and the eighth main channel is provided.

Referring to FIG. 2 and FIG. 3, the first channel switching device 303 has a columnar first switching button 303 a having a first coupling channel 303 b for coupling the first channel 301 a and the second channel 301 b with each other on a first position and a second coupling channel 303 c for coupling the first channel 301 a and the third channel 302 with each other on a second position by sliding in a direction substantially perpendicular to a plane including the first main channel and the second main channel, and a first coil spring 303 f for urging the first switching button 303 a so that the first switching button 303 a is urged to be located on the first position in a general state and the first switching button 303 a is located on the second position only when moved against urging force.

This first coil spring 303 f is arranged between a first concave part 303 e provided on the first switching button 303 a and a first concave part 301 p provided on the body frame 301.

The first switching button 303 a is provided with a first recognition concave part 303 d for allowing a person manipulating the manifold 300 to tactually recognize the position of the first switching button 303 a.

Such a state that the first switching button 303 a is on the first position is referred to as state A1, and such a state that the first switching button 303 a is on the second position is referred to as state A2.

Referring to FIG. 2 and FIG. 4, the second channel switching device 305 has a second switching button 305 a having a third coupling channel 305 b for coupling the second channel 301 b and the fourth channel 301 c with each other on a first position by sliding in a direction substantially perpendicular to a plane including the third main channel and the fourth main channel and a fourth coupling channel 305 c for coupling the second channel 301 b and the fifth channel 304 with each other on a second position and a second coil spring 305 f for urging the second switching button 305 a so that the second switching button 305 a is urged to be located on the first position in a general state and the second switching button 305 a is located on the second position only when moved against urging force.

This second coil spring 305 f is arranged between a second concave part 305 e provided on the second switching button 305 a and a second concave part 301 q provided on the body frame 301.

The second switching button 305 a is provided with a second recognition convex part 305 d for allowing the person manipulating the manifold 300 to tactually recognize the position of the second switching button 305 a.

Such a state that the second switching button 305 a is on the first position is referred to as state B1, and such a state that the second switching button 305 a is on the second position is referred to as state B2.

Referring to FIG. 2 and FIG. 5, the third channel switching device 307 has a third switching button 307 a having a fifth coupling channel 307 b for coupling the sixth channel 301 d and the ninth channel 301 g with each other on a first position by sliding in a direction substantially perpendicular to a plane including the fourth channel 301 c, the fifth main channel and the sixth main channel and a sixth coupling channel 307 c for coupling the sixth channel 301 d and the fourth channel 301 c with each other on a second position and a third coil spring 307 f for urging the third switching button 307 a so that the third switching button 307 a is urged to be located on the first position in a general state and the third switching button 307 a is located on the second position only when moved against urging force.

This third coil spring 307 f is arranged between a first concave part 307 e provided on the third switching button 307 a and a third concave part 301 r provided on the body frame 301.

The third switching button 307 a is provided with a third recognition concave/convex part 307 d for allowing the person manipulating the manifold 300 to tactually recognize the position of the third switching button 307 a.

Such a state that the third switching button 307 a is on the first position is referred to as state C1, and such a state that the third switching button 307 a is on the second position is referred to as state C2.

Referring to FIG. 1 and FIG. 6, the fourth channel switching device 308 has a ball valve 308 b for moving between a first position and a second position in a plane including the seventh main channel and the eighth main channel thereby coupling the seventh channel 306 and the ninth channel 301 g with each other on the first position and coupling the ninth channel 301 g and the eighth channel 301 f with each other on the second position, a ball valve chest 308 a instructing movement of this ball valve 308 b and a fourth coil spring 308 f for urging the ball valve 308 b so that the ball valve 308 b is urged to be located on the first position in a general state and the ball valve 308 b is located on the second position against urging force only when the flow rate in the eighth channel 30 if exceeds a prescribed value.

This fourth coil spring 307 f is provided between a step part 306 a provided on the seventh channel 306 and the ball valve 308 b.

Such a state that the ball valve 308 b is on the first position is referred to as state D1, and such a state that the ball valve 308 b is on the second position is referred to as state D2.

While members of columnar shapes are employed as the shapes of the aforementioned first switching button 303 a, second switching button 305 a and third switching button 307 a, the present invention is not necessarily restricted to this shape but any shape is employable so far as the same has a similar function. Further, the first coil spring 303 f, the second coil spring 305 f and the third coil spring 307 f are not restricted to the coil springs either but elastic members of any shapes are employable so far as the same have similar functions.

A [sphygmomanometric operation], a [contrast medium aspirating operation], a [contrast medium introducing operation], a [physiological salt solution aspirating operation] and a [physiological salt solution introducing operation] employing the manifold 300 having the aforementioned structure are now described with reference to FIG. 7 to FIG. 12. As shown in each figure, it is assumed that a syringe 100 is connected to one end of the first channel 301 a of the manifold 300, a contrast medium 250 is connected to the third channel 302 in a flowable manner, a physiological salt solution is connected to the fifth channel 304 in a flowable manner, a sphygmomanometlic apparatus 270 is connected to the seventh channel 306, and a catheter 210 having an end introduced into a blood vessel of a case similarly to the case of the prior art is connected to the sixth channel 301 d with interposition of a rotator 220.

[Sphygmomanometric Operation]

With reference to FIG. 7, the sphygmomanometric operation employing the manifold 300 is described. In the sphygmomanometric operation, an operator may manipulate nothing but the sixth main channel and the seventh main channel enter open states due to the third channel switching device 307 being in the state C1 and the fourth channel switching device 308 being in the state D1, the blood from the case is introduced into the sphygmomanometlic apparatus 270, and the blood pressure of a case 320 is measurable.

[Contrast Medium Aspirating Operation]

With reference to FIG. 8, the contrast medium aspirating operation employing the manifold 300 is described. In the contrast medium aspirating operation, the state A2 is attained while pressing the first switching button 303 a of the first channel switching device 303, for forming the second main channel. Thus, aspiration of the contrast medium 250 employing the syringe 100 is enabled. At this time, sphygmomanometry of the case 320 is continued as such in the third channel switching device 307.

[Contrast Medium Introducing Operation]

With reference to FIG. 9, the contrast medium introducing operation employing the manifold 300 is described. In the contrast medium introducing operation, pressing of the first switching button 303 a of the aforementioned first channel switching device 303 is canceled to attain the state A1, for starting introduction of the contrast medium 250 employing the syringe 100. At this time, a flow rate exceeding a prescribed value takes place in the eighth channel 308 f in the fourth channel switching device 308, and hence the ball valve 308 b moves to the second position against the urging force, the fourth channel switching device 308 enters the state D2, and the eighth main channel enters an open state. Consequently, it is enabled to introduce the contrast medium stored in the syringe 100 into the case.

At this time, the third channel switching device 307 automatically returns to the state D1 due to change of pressure in the seventh main channel and the eighth main channel, and sphygmomanometry of the case 320 is restarted.

The present invention is not restricted to the case of employing the syringe 100 in the contrast medium introducing operation but it is also possible to employ a contrast medium introducing apparatus 150 shown in FIG. 10, for example, for coupling an outlet 150 a of the contrast medium introducing apparatus 150 and the first channel 301 a with each other.

[Physiological Salt Solution Aspirating Operation]

With reference to FIG. 11, the physiological salt solution aspirating operation employing the manifold 300 is described. In the physiological salt solution aspirating operation, the state B2 is attained while pressing the second switching button 305 a of the second channel switching device 305, for forming the fourth main channel. Thus, the first main channel and the fourth main channel communicate with each other, and aspiration of a physiological salt solution 260 employing the syringe 100 is enabled.

[Physiological Salt Solution Introducing Operation]

With reference to FIG. 12, the physiological salt solution introducing operation employing the manifold 300 is described. In the physiological salt solution introducing operation, the pressing of the first switching button 305 a of the aforementioned second channel switching device 305 is canceled to attain the state B1, for starting introduction of the physiological salt solution 260 employing the syringe 100.

At this time, the pressure in the eighth channel 308 f rises in the fourth channel switching device 308, and hence the ball valve 308 b moves to the second position against the urging force, the fourth channel switching device 308 enters the state D2, and the eighth main channel enters an open state. Consequently, it is enabled to introduce the physiological salt solution stored in the syringe 100 into the case 320.

In the manifold 300 in this embodiment, the first main channel, the second main channel and the fifth main channel enter communicating states by attaining the state C2 while pressing the third switching button 307 a of the third channel switching device 307 as shown in FIG. 13, and hence it is also enabled to readily perform aspiration of the blood of the case with inside the syringe 100.

According to the manifold 300 in this embodiment, as hereinabove described, it is enabled to perform each operation only by pushing either switching button of the first switching button 303 a of the first channel switching device 303, the second switching button 305 a of the second channel switching device 305 or the third switching button 307 a of the third channel switching device 307, and it is enabled to reduce the quantity of manipulation required to the operator.

Further, the first switching button 303 a, the second switching button 305 a and the third switching button 307 a are provided with the first recognition concave part 303 d, the second recognition convex part 305 d and the third recognition concave/convex part 307 d for recognizing the positions respectively, whereby it is enabled to reliably perform manipulation of the respective first channel switching device 303, second channel switching device 305 and third channel switching device 307 also in operations of the operator by touch.

In the first switching button 303 a employed for the aforementioned manifold 300, it is preferable to provide a gas port 303 g formed by a concave part groove coupling with the first coupling channel 303 b and the second coupling channel 303 c on a surface of the first switching button 303 a, as shown in FIG. 14. When rendering the shape of the first switching button 303 a a columnar shape, it is possible to prevent rotation of the first switching button 303 a by providing a slit 303 h on the first switching button 303 a on a lower end portion and providing a convex part (illustration omitted) engaging in this slit 303 h on the body part 301 side as shown in FIG. 15. As to the aforementioned gas port and the aforementioned slit, therefore, it is preferable to provide the same also on the second switching button 305 a shown in FIG. 4 and the third switching button 307 a shown in FIG. 5.

In the structure of the fourth channel switching device 308 shown in FIG. 6, the inner diameter of the ball valve chest 308 a is provided in a size substantially identical to the outer diameter of the ball valve 308 b. When the seventh channel 306 is closed and the pressure of a fluid in the eighth channel 30 if rises, therefore, it may not be possible to completely close the seventh channel 306 with the ball valve 308 b due to a fluid remaining in the seventh passage 306 although the ball valve 308 b moves toward the seventh channel 306. In such a case, the fluid remaining in the seventh channel 306 is enabled to temporarily flow to the ninth channel by providing a spare room 308 m in the ball valve chest 308 a as shown in FIG. 16, and it is consequently enabled to completely close the seventh channel 306 with the ball valve 308 b. Further, the capacity of the ball valve chest 308 a can be reduced by providing the spare room 308, and hence it is enabled to shorten the movement stroke of the ball valve 308 b.

As shown in FIG. 16, it is preferable to arrange O-rings 308 p consisting of an elastic member such as rubber for ensuring closure of the seventh channel 306 and the eighth channel 301 f with the ball valve 308 b. In this case, the shape of the fourth coil spring 308 n is as shown in the figure.

As shown in FIG. 17, further, it is possible to render the fourth coil spring unnecessary by employing a member having magnetism for the ball valve 308 b and arranging magnets 308 q for attaining aspiration repulsion by magnetic force in the exterior of the ball valve chest 308 a. Consequently, obstacles in the channels are reduced and the structure of the fourth channel switching device 308 can be simplified.

It is also possible to employ a structure of making the O-rings 308 p also have the action of the magnets 308 q and rendering the magnets 308 q unnecessary by employing rubber magnets or magnets covered with rubber for the O-rings 308 p.

(Embodiment 2)

FIG. 18 shows the structure of a manifold 400 employing structures as modifications of the first channel switching device 303 and the second channel switching device 305 in the aforementioned embodiment 1. FIG. 18 shows a partial sectional view of a first channel switching device 403 and a second channel switching device 405 of the manifold 400. The structures of a third channel switching device 307 and a fourth channel switching device 308 are identical, and description here is omitted.

Referring to FIG. 18, a body part 401 is provided with a first channel 401 a, a second channel 401 b, a third channel 402, a fourth channel 401 c and a fifth channel 404. As to a sixth channel 301 d, a seventh channel 306 and an eighth channel 301 f and a ninth channel 301 g diverging from the fourth channel 401 c, these are similar to the embodiment 1 and description by illustration is omitted.

A first main channel is formed by coupling the first channel 401 a and the second channel 40lb with each other. A second main channel is formed by coupling the first channel 401 a and the third channel 402 with each other. A first channel switching device 403 for switching the first main channel and the second main channel is provided for the first channel 401 a, the second channel 401 b and the third channel 402.

A third main channel is formed by coupling the second channel 401 b and the fourth channel 401 c with each other. A fourth main channel is formed by coupling the second channel 401 b and the fifth channel 404 with each other. A second channel switching device 405 for switching the third main channel and the fourth main channel is provided for the second channel 401 b, the fourth channel 401 c and the fifth channel 404.

As to a third channel switching device 307 for switching a fifth main channel and a sixth main channel and a fourth channel switching device 308 for switching a seventh main channel and an eighth main channel, these are similar to the embodiment 1 and description by illustration is omitted.

Referring to FIG. 18, the first channel switching device 403 has a columnar first switching button 403 a having a first coupling channel 403 b for coupling the first channel 401 a and the second channel 401 b with each other on a first position and coupling the first channel 401 a and the third channel 402 with each other by sliding in a direction substantially perpendicular to a plane including the first main channel and the second main channel and a first coil spring 403 f for urging the first switching button 403 a so that the first switching button 403 a is urged to be located on the first position in a general state and the first switching button 403 a is located on the second position only when moved against urging force.

This first coil spring 403 f is arranged between a first concave part 403 e provided on the first switching button 403 a and a first concave part 401 p provided on the body frame 401.

The first switching button 403 a is provided with a first recognition concave part 403 d for allowing an operator manipulating the manifold 400 to tactually recognize the position of the first switching button 403 a.

Such a state that the first switching button 403 a is on the first position is referred to as state A1, and such a state that the first switching button 403 a is on the second position is referred to as state A2.

The second channel switching device 420 has a second switching button 420 a having a fourth coupling channel 420 b for coupling the second channel 401 b and the fourth channel 401 c with each other on a first position and coupling the second channel 401 b and the fifth channel 404 with each other on a second position by sliding in a direction substantially perpendicular to a plane including the third main channel and the fourth main channel and a second coil spring 420 e for urging the second switching button 420 a so that the second switching button 420 a is urged to be positioned on the first position in a general state and the second switching button 420 a is located on the second position only when moved against urging force.

This second coil spring 420 e is arranged between a second concave part 420 d provided on the second switching button 420 a and a second concave part 401 q provided on the body frame 401.

The second switching button 420 a is provided with a second recognition convex part 420 c for allowing the person manipulating the manifold 400 to tactually recognize the position of the second switching button 420 a.

Such a state that the second switching button 420 a is on the first position is referred to as state B1, and such a state that the second switching button 420 a is on the second position is referred to as state B2.

While members of columnar shapes are employed as the shapes of the aforementioned first switching button 403 a and second switching button 420 a, the present invention is not necessarily restricted to this shape but any shape is employable so far as the same has a similar function. Further, the first coil spring 403 f and the second coil spring 420 e are not restricted to the coil springs either but elastic members of any shapes are employable so far as the same have similar functions.

It is enabled to attain function/effect similar to the aforementioned embodiment 1 also in case of using the manifold 400 employing the first channel switching device 403 and the second channel switching device 405 consisting of the aforementioned structures.

While the case of applying the present invention to a manifold employed for angiography has been described as exemplary application of the present invention in each of the aforementioned embodiments, the present invention is not restricted to this exemplary application but is applicable to channel switching of other various fluids.

Therefore, it is to be considered that each of the aforementioned embodiments disclosed this time is illustration and not restrictive in all points. The scope of the present invention is shown not by the above description but the scope of claim for patent, and it is intended that all modifications within the meaning and range equivalent to the scope of claim for patent are included. 

What is claimed is:
 1. A channel switching apparatus comprising: a body frame including a first channel, a second channel, a third channel, a fourth channel, a fifth channel, a sixth channel, a seventh channel, and an eighth channel and a ninth channel diverging from said fourth channel; first channel switching means for switching a first main channel formed by coupling said first channel and said second channel with each other and a second main channel formed by coupling said first channel and said third channel with each other; second channel switching means for switching a third main channel formed by coupling said second channel and said fourth channel with each other and a fourth main channel formed by coupling said second channel and said fifth channel with each other; third channel switching means for switching a fifth main channel formed by coupling said fourth channel and said sixth channel with each other and a sixth main channel formed by coupling said sixth channel and said ninth channel with each other; and fourth channel switching means for switching a seventh main channel formed by coupling said seventh channel and said ninth channel with each other and an eighth main channel formed by coupling said eighth channel and said ninth channel with each other, wherein said first channel switching means has: first switching means provided on an intersection point between said first channel, said second channel and said third channel and having a first coupling channel for coupling said first channel and said second channel with each other on a first position and a second coupling channel for coupling said first channel and said third channel with each other on a second position by sliding in a direction substantially perpendicular to a plane including said first main channel and said second main channel, and first urging means for urging said first switching means so that said first switching means is urged to be located on said first position in a general state and said first switching means is located on said second position only when moved against urging force, said second channel switching means has: second switching means provided on an intersection point between said second channel, said fourth channel and said fifth channel and having a third coupling channel for coupling said second channel and said fourth channel with each other on a first position and a fourth coupling channel for coupling said second channel and said fifth channel with each other on a second position by sliding in a direction substantially perpendicular to a plane including said third main channel and said fourth main channel, and second urging means for urging said second switching means so that said second switching means is urged to be located on said first position in a general state and said second switching means is located on said second position only when moved against urging force, said third channel switching means has: third switching means provided on an intersection point between said fourth channel, said sixth channel and said ninth channel and having a fifth coupling channel for coupling said sixth channel and said ninth channel with each other on a first position and a sixth coupling channel for coupling said sixth channel and said fourth channel with each other on a second position by sliding in a direction substantially perpendicular to a plane including said fifth main channel and said sixth main channel, and third urging means for urging said third switching means so that said third switching means is urged to be located on said first position in a general state and said third switching means is located on said second position only when moved against urging force, and said fourth channel switching means has: fourth switching means provided on an intersection point between said seventh channel, said eighth channel and said ninth channel for sliding between a first position and a second position in a plane including said seventh main channel and said eighth main channel thereby coupling said seventh channel and said ninth channel with each other on said first position and coupling said ninth channel and said eighth channel with each other on said second position, and fourth urging means for urging said fourth switching means so that said fourth switching means is urged to be located on said first position in a general state and said fourth switching means is located on said second position against urging force only when the flow rate in said eighth channel exceeds a prescribed value.
 2. The channel switching apparatus in accordance with claim 1, wherein said first switching means is a first columnar member extending in the direction substantially perpendicular to the plane including said first main channel and said second main channel, and said first coupling channel and said second coupling channel are provided on its body part with a space in said perpendicular direction, a first concave part for storing said urging means is provided on one end of said first columnar member while a first recognition area for allowing a person manipulating the channel switching apparatus to tactually recognize the position of said first switching means is provided on the other end, said second switching means is a second columnar member extending in the direction substantially perpendicular to the plane including said third main channel and said fourth main channel, and said third coupling channel and said fourth coupling channel are provided on its body part with a space in said perpendicular direction, a second concave part for storing said urging means is provided on one end of said second columnar member while a second recognition area for allowing the person manipulating the channel switching apparatus to tactually recognize the position of said second switching means is provided on the other end, said third switching means is a third columnar member extending in the direction substantially perpendicular to the plane including said fifth main channel and said sixth main channel, and said fifth coupling channel and said sixth coupling channel are provided on its body part with a space in said perpendicular direction, a third concave part for storing said urging means is provided on one end of said third columnar member while a third recognition area for allowing the person manipulating the channel switching apparatus to tactually recognize the position of said third switching means is provided on the other end, and different shapes are provided for said first recognition area, second recognition area and third recognition area respectively.
 3. The channel switching apparatus in accordance with claim 1, wherein a syringe having a piston is connected to said first channel and a contrast medium is connected to said third channel in a flowable manner, a physiological salt solution is connected to said fifth channel in a flowable manner, the other end of a catheter having an end introduced into a blood vessel of a human body is connected to said sixth channel, and a sphygmomanometric apparatus is connected to said seventh channel. 